Weihua Xiong, Lijuan Li, Jiaojiao Ren, Jian Gu, Dandan Zhang. THz Multi-Feature Parameter Imaging of Bonding Defects of High Temperature Composite Materials[J]. Acta Optica Sinica, 2020, 40(17): 1711001
- Acta Optica Sinica
- Vol. 40, Issue 17, 1711001 (2020)
Fig. 1. Schematic diagram of sample structure of high temperature composite material. (a) High temperature composite material structure; (b) upper and lower layer defects of high temperature composite material
Fig. 2. Schematic of reflective terahertz
Fig. 3. Introduction of high temperature composite material samples
Fig. 4. THz time-domain waveform of feature extraction from different parts of high temperature composite material. (a) Normal bonding area of upper layer; (b) defect bonding area of upper layer; (c) normal bonding area of lower layer; (d) debonding area of lower layer
Fig. 5. Experimental imaging results of the upper layer preset defects. (a) Variance imaging; (b) peak-to-peak imaging; (c) energy imaging; (d) coefficient of variation imaging;(e) mean imaging; (f) multi-feature parameter imaging
Fig. 6. Physical picture of sample defects. (a) Physical image of the sample defect is not extracted; (b) physical image of the sample defect is extracted
Fig. 7. Experimental imaging results of the lower layer preset defects. (a) Kurtosis imaging; (b) minimum imaging; (c) amplitude imaging; (d) energy imaging; (e) multi-feature parameter imaging
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Table 1. Relative area of defects in different imaging methods%
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Table 2. Comparison of image quality
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